The alarm sounds are the only plus. – Sleep Science Alarm Clock Review

I've used this app for a week, and 2 of the last 3 days it has appeared to work normally, then not logged any data and told me I've slept 0 hours. Nothing graphed, nothing logged whatsoever. The app continually notifies me to upgrade to the "new" version (which is the version I'm currently running), and every time I open it there is a popup that tries to get me to make a $1.99 purchase. Save your time; this thing is useless.
Review by xxintrovertx on Sleep Science Alarm Clock.